Olefin polymerization catalyst and process for olefin polymerization
CA 2300133 A1 · Owner: Tohi, Yasushi · Inventors: Fujita, Terunori; Tohi, Yasushi; Matsui, Shigekazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A catalyst for olefin polymerization which is highly active in olefin polymerization and with which a polyolefin having excellent properties can be produced; and a method of polymerizing an olefin using the catalyst. The catalyst comprises (A) a transition metal imine compound represented by general formula (I) and (B) at least one compound selected among (B-1) an organometallic compound, (B-2) an organoaluminumoxy compound and (B-3) a , compound which reacts with the compound (A) to form an ion pair.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed June 16, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 16, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 16, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.